Sudoku
Play classic Sudoku online for free! Enjoy solo brain training with dynamic tutorials, or challenge friends in real-time multiplayer speed run mode. No download required.
图文教程
How to Play Sudoku
A Sudoku grid is made of 9 rows, 9 columns, and 9 3x3 sub-grids. Here is a miniature 4x4 example.
How to Play Sudoku
Welcome to the ultimate guide on How to Play Sudoku! Sudoku is a globally beloved logic-based number placement puzzle. It doesn't require any math skills—just pure logical deduction.
Basic Rules
- The Grid: The standard Sudoku game is played on a 9x9 grid, which is divided into nine 3x3 sub-grids (blocks).
- The Goal: Fill every empty cell so that every row, every column, and every 3x3 block contains the digits 1 through 9 exactly once.
- No Repetition: If a row already contains a '5', you cannot place another '5' in that same row. The same rule applies to columns and 3x3 blocks.
Essential Strategies for Beginners
- Scanning: Look for a specific number (e.g., 1) and scan all rows and columns to see where it can logically fit in a 3x3 block.
- Lone Candidates: If a cell is surrounded by 8 different numbers in its row, column, and block, the remaining 9th number must go there.
- Pencil Marks (Notes): Use the "Notes" feature to jot down possible numbers for a cell. This helps narrow down possibilities when the puzzle gets harder.
Frequently Asked Questions (FAQ)
Q: Do I need to be good at math to play Sudoku? A: Not at all! Sudoku is purely about pattern recognition and logic. You could replace the numbers 1-9 with letters or colors, and the game would play exactly the same.
Q: Is guessing allowed? A: True Sudoku puzzles can always be solved using pure logic. Guessing is highly discouraged, as one wrong guess will ruin the entire board!